Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7002c380e1225b…

MALICIOUS

PDF

97.0 KB Created: 2021-04-06 23:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: adbad61dbcfcfb32b46649bcc94c2846 SHA-1: 5cd936e0014c35f3e0538869b58b4d0753b31619 SHA-256: 3d7002c380e1225b7bf3dbe0f823f7e2fafc9aafda7964ae1bf610c46b1e766b
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/123?utm_term=aashiqui+2+full+movie++3gp+mp4 PDF link annotation
    • http://dulugidi.iblogger.org/how_much_does_a_rheem_furnace_cost.pdfIn PDF document text
    • https://xujoxufopugapes.weebly.com/uploads/1/3/1/3/131380539/mewumafegasezer_maputetizaluzu.pdfIn PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/eb2092fdee9b.pdfIn PDF document text
    • https://jetujonupukoj.weebly.com/uploads/1/3/1/1/131163664/marepeja.pdfIn PDF document text
    • http://bobositufunoto.iblogger.org/ramolomutewuwimovozezenax.pdfIn PDF document text
    • https://kixoligo.weebly.com/uploads/1/3/4/6/134608980/vavonawe.pdfIn PDF document text
    • https://rujizubag.weebly.com/uploads/1/3/0/7/130776042/1674263.pdfIn PDF document text
    • https://towodoruzaxigol.weebly.com/uploads/1/3/6/0/136050186/3856514.pdfIn PDF document text
    • https://didunomupipopad.weebly.com/uploads/1/3/1/4/131438203/88859a67.pdfIn PDF document text
    • https://rafafusutur.weebly.com/uploads/1/3/4/8/134858683/ea40b5b340d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mejefelutirarej.epizy.com/midland_gxt_650_walkie_talkie_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8516c8c7-ab9a-4d68-a7a7-351e044f9b15/what_is_the_nutritional_value_of_dehydrated_vegetables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1164ca-1699-47e0-81e3-9a0a4b6ca25f/vufivorilaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e613f2e-beaf-4968-9aa8-f360ec9bd48e/que_es_fragmento_literario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb8393b-b16c-4e77-9403-237ab91bb7f6/imagen_de_carita_triste_para_whatsapp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92bbd778-cc2b-4dd7-9ca8-26ac67499fbb/82370689009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af709a53-393d-4e0b-bc92-4cc28ccae2a4/sigasokasorizobirek.pdfIn PDF document text
    • http://tipokeviti.atwebpages.com/22913778207.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/nimerafufanakageposu.pdfIn PDF document text
    • http://tavuxikib.epizy.com/wikuwerorawufum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74cdb89-b6c4-4ea4-99b9-fd18f963e2c1/97325423907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1115a3-2436-4311-bce9-38497e8aeced/40356523482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4378046-a60a-424c-b7bd-7ab3126cdf0c/how_to_make_a_balsa_wood_bridge.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/77849683002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6aabee-ee29-471e-8dcb-85156807a0b5/fuxewogazunebadepetodiv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001270f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270F 5776 bytes
SHA-256: 6dac1c73e52bfccc70c23b410491b4a10fe531354b1d6da6152399efa0e7de36
font_01_sfnt_off00013ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB5 11060 bytes
SHA-256: 2ed4fb6f16db53fe46303b6c1ccb601ee0533a56af87608af584ef3b1e0c7f46
font_02_sfnt_off000160b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160B9 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8