Malicious PDF — malware analysis report

Static analysis result for SHA-256 495a487adc5d0415…

MALICIOUS

PDF

100.1 KB Created: 2021-02-19 00:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 549e5ec7b53ed9fc61774a39d0259770 SHA-1: 5f1e999d1c5324b8c3f29168148f98d63953b190 SHA-256: 495a487adc5d041550102d368ad139c002d074dbeaecf1dbd1f46aa940b5aafd
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or link farm document. It contains a large number of external links, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The presence of embedded URLs and the overall structure strongly indicate a phishing or SEO spam attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jacksth.ru/123?utm_term=scout+log+book+pdf+in+malayalam PDF link annotation
    • http://topvideo.design/breve_storia_della_lingua_italianazqym0.pdfIn PDF document text
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/kobexepawu.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/gii0jce/amc_30_houston.pdfIn PDF document text
    • http://whalesqpa.fun/72234601226oftmn.pdfIn PDF document text
    • https://tefojemitadu.weebly.com/uploads/1/3/1/6/131606809/dabugefopoda.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/aihhhhe/offline_games_for_chromebook.pdfIn PDF document text
    • https://livadekawa.weebly.com/uploads/1/3/5/3/135317457/e06ba.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/chcI8Uq/photo_transfer_app_for_windows_xp.pdfIn PDF document text
    • https://kitopelok.weebly.com/uploads/1/3/4/3/134355781/9580334.pdfIn PDF document text
    • https://vanosejifewufe.weebly.com/uploads/1/3/0/8/130814052/tonomadivefobiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/fozuwasixeja/LhcahcL/bowmaster_pc_game.pdfIn PDF document text
    • http://civiliscmq.online/77021057328j3y91.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/sxkBfhj/bird_paradise_new_jersey.pdfIn PDF document text
    • https://nuzozixajalupik.weebly.com/uploads/1/3/0/7/130739607/dalaxuj-zugelaf-vonijo-xijekisudesik.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://s3.amazonaws.com/povodijirig/dibikutigeseno.pdfIn PDF document text
    • http://rebokomixuxoj.epizy.com/garmin_nvi_2699_lmt-d_eu_navigationsgert.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/structure_of_borazine.pdfIn PDF document text
    • http://tapejufujol.epizy.com/how_much_is_a_commercial_washer.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_off00013a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0F 5372 bytes
SHA-256: 1993d6f149fbac2e89a91463ae2a223ef329f17e140d755eca7fd5c6d9afefb1
font_01_sfnt_off00014c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C3B 11692 bytes
SHA-256: 0f98bab38ede050cae2008a3923ae34acbe3781f908290dbaeefd69b5c9dbb58
font_02_sfnt_off0001731e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1731E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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