Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88d792b366b82d1…

MALICIOUS

PDF

83.1 KB Created: 2021-03-16 21:26:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 70035f3a433650cefa18cc3df9ca1db7 SHA-1: 211640ab5cb84e3778d41e89d49e974b547948d5 SHA-256: e88d792b366b82d1923eaf7ca86e824afe5c9fc8e7c95cd0034de20c07ada3ce
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, containing numerous external URLs designed to lure users to potentially malicious websites, such as the one at 'druttle.ru'. The presence of multiple external links and the ML classification strongly suggest an intent to redirect users for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/strik?utm_term=giant+food+stores+employee+login+ahold PDF link annotation
    • http://resezowuzotul.22web.org/poets_and_writers_guide_to_literary_agents.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fe4123f7a54a.pdfIn PDF document text
    • https://nixixope.weebly.com/uploads/1/3/0/8/130874324/a982de41f901ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485321/normal_5ffa33571390f.pdfIn PDF document text
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/5918961.pdfIn PDF document text
    • http://poguferuliwu.iblogger.org/32025443164.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377109/normal_5ff15da854f02.pdfIn PDF document text
    • https://kaxaxelakag.weebly.com/uploads/1/3/4/2/134235500/jibunaz-nuwazovipex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_fc61db0b8230455eacfa1557527def32.pdf?index=trueIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_b97fd1216b5f427290b4219e56504bc3.pdf?index=trueIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_ba9f4cf3c32f476f91889eedd58ed645.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/data_communication_and_networking_forouzan_mcq.pdfIn PDF document text
    • https://09af0a6c-c0e6-47ff-90c1-5b173435ccd1.filesusr.com/ugd/b92b66_5c99d869081d4e96a2e25d4b76845679.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/adb_open_android_settings.pdfIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_6dbc2b30c47c4bd7b9d5740ffcf9800f.pdf?index=trueIn PDF document text
    • http://gotenekopibijo.epizy.com/automobile_plastic_parts_and_their_materials.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/asics_running_shoe_guide.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_4407676997164a64a1ac393da60057fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/minelemilesiw.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_c975073e26144c2f96b346d8608ef610.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_e3bef28845b24f0dae959710be323b72.pdf?index=trueIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_59aeff5e3ac840a2b574a7f51b94cf75.pdf?index=trueIn PDF document text
    • http://werolalijatet.rf.gd/9229610065.pdfIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_82f92b63af684838b896864c362bab35.pdf?index=trueIn PDF document text
    • http://gigevowujuro.rf.gd/what_does_esoteric_mean_in_english.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 5376 bytes
SHA-256: 3685eace90f361271dec8f0b8d67a60d1ed7dd50ceae6e3c620262a45d0e999a
font_01_sfnt_off000107b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B9 12108 bytes
SHA-256: 795de1eb3003fb38edb79b4c5cafc4d61faff11ee82414b3d8392f22b77620e3
font_02_sfnt_off00013091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13091 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e