Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f74caf62a955c21…

MALICIOUS

PDF

85.8 KB Created: 2021-03-19 11:20:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ecd912c2e0a560fd420ade119d348ed0 SHA-1: 060f56973608dfe2d2b902333a2af532e315c72d SHA-256: 7f74caf62a955c21d8ea49bb758c8923991ee3a0dc1a4d46dbda58e55a2d1414
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to hacking and APKs, aligning with the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://resalured.ru/wix?keyword=bike+race+pro+hack+ultra+bike+apk PDF link annotation
    • http://rafale.store/wimarebazivoduxifajthb4e.pdfIn PDF document text
    • http://freud.icu/download_gta_san_andreas_mod_apk_and_datao25yk.pdfIn PDF document text
    • https://cdn.sqhk.co/fafaviwi/cWEgjga/leap_of_faith_definition_webster.pdfIn PDF document text
    • http://foyou.store/is_sociology_in_high_school_hard66obg.pdfIn PDF document text
    • http://afracheat6.xyz/303165656291ujh9.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/PibLjcP/clothes_worksheets_clipart.pdfIn PDF document text
    • http://googsnat.space/70451091898brizi.pdfIn PDF document text
    • http://www19216801.site/final_fantasy_7_walkthrough_dons_mansiondw3ya.pdfIn PDF document text
    • https://gavuwili.weebly.com/uploads/1/3/1/0/131070236/vavogil_tijemakokunuz_nagubuxivukejos_naxanizobe.pdfIn PDF document text
    • https://cdn.sqhk.co/fufeboxeri/jdjd39n/lego_hidden_side_all_new_sets.pdfIn PDF document text
    • https://cdn.sqhk.co/lezubenewago/jSgjijE/76987707035.pdfIn PDF document text
    • http://4d-5d.com/788973860290tsgk.pdfIn PDF document text
    • http://zoneeuro.pro/social_champ_reviewsjhux5.pdfIn PDF document text
    • https://jalamipitifem.weebly.com/uploads/1/3/0/7/130738892/mezojidozikiloxif.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
    • http://bufizufidubak.rf.gd/present_and_past_participle_adjectives_exercises.pdfIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_036cc51189df4812966b107ab2f665e2.pdf?index=trueIn PDF document text
    • http://lidilivutusiji.epizy.com/metformin_for_pcos_results.pdfIn PDF document text
    • https://cd65756b-a9c7-4cca-9498-1747a6459195.filesusr.com/ugd/05eb20_eee295058263412aa3a37162714ec39c.pdf?index=trueIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_bfad2a2ba81348729c71b6efd91c1a27.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFB 2960 bytes
SHA-256: 9e8301a812e0963997f2c69c75bfd39e7fcc44359b8a43baf6657440e065e79d
font_01_sfnt_off0001056b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 4872 bytes
SHA-256: ea514fead9fdbfde8e430a66df68171467f205d51a25c09c6ac12a273f80b0ce
font_02_sfnt_off00011604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11604 10832 bytes
SHA-256: fd40611b538eb054073a0fb637c3aafc254891434e7aeda08511a9933552f8ba
font_03_sfnt_off00013b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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