Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a7b06ad0a5e683…

MALICIOUS

PDF

82.2 KB Created: 2021-03-05 04:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 3ffd6b8bde0813d6686b7dac6f1ccfe5 SHA-1: f9ec2e2fa718650caae274804522f22ef4cf6a50 SHA-256: 42a7b06ad0a5e683369e5a2e6895e7a0c7f895099b4e67f8112dcab80b8f3854
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs likely lead to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=burger+island+game+mobile PDF link annotation
    • https://salupoxegiras.weebly.com/uploads/1/3/5/9/135961269/tinufebego.pdfIn PDF document text
    • https://zovakilezogavi.weebly.com/uploads/1/3/1/1/131163957/6876217.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/what_is_grant_of_letters_of_administration.pdfIn PDF document text
    • https://vomuzubedabop.weebly.com/uploads/1/3/0/9/130969103/47306ef27b47b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_6002ea804e2f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_603c1d655eeb7.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/how_to_say_multiple_times_in_french.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fca6b09ca215.pdfIn PDF document text
    • https://xaxazusilu.weebly.com/uploads/1/3/4/7/134757455/91c6d9.pdfIn PDF document text
    • https://vaxovuxaso.weebly.com/uploads/1/3/3/9/133997441/gumatawife-sudifo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bimegisekew.epizy.com/angry_birds_space_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40b0f99e-bea4-4c80-9c38-e93f52697dcf/jutolutoreroluweno.pdfIn PDF document text
    • http://lawakeweba.epizy.com/41562568327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e89083-feba-4df2-935e-8311ed02b6e5/altered_carbon_season_2_episode_1_end_credits_song.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_9ac746cf61b24b2f813bad2510bf89ba.pdf?index=trueIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_249beb5f13b6454ab5ce3b6d9a2db349.pdf?index=trueIn PDF document text
    • http://nodupevijaviv.rf.gd/84933343998.pdfIn PDF document text
    • http://volajigatume.epizy.com/guguxawigiwaxijexulus.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 5336 bytes
SHA-256: 67e4f8b525cdcc995a99e633c63e2db48e5a140b17e5278fac35fc91e8f4765e
font_01_sfnt_off0000f818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF818 1776 bytes
SHA-256: 4718f2ba7cd8690879bac8a8de018feffd507924ecbb3f6a36a9f7b9ae118d64
font_02_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 10376 bytes
SHA-256: e7ebe38d84a979cf75e19924d262377d031cef6c00e0563b82d0b237c826e732
font_03_sfnt_off0001244d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244D 16372 bytes
SHA-256: 457ac33fbafdaef5ee9a1f0d63c0f13201f85db319d0362f241f40124f729047