Malicious PDF — malware analysis report

Static analysis result for SHA-256 0520f84368cd338b…

MALICIOUS

PDF

69.4 KB Created: 2021-03-25 06:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a415c6848483efe912c930db04ce6ad9 SHA-1: 1b030f1423e1ebc45dce1a65155e45fd3efe3df4 SHA-256: 0520f84368cd338b12a0487f878c3227746ebe904cc78c166997b2aab67496a1
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains references to 'Bhp billiton annual report 2008', suggesting a lure for users. The presence of numerous external links, including one pointing to a potential SEO link farm, further supports a malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=bhp+billiton+annual+report+2008
    • https://benanuvez.weebly.com/uploads/1/3/0/8/130813453/9309498.pdf
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/bujuvuzotipu.pdf
    • https://cdn-cms.f-static.net/uploads/4462696/normal_5fd182f05a5a0.pdf
    • http://bibopasaxuvibu.mypressonline.com/rodifika.pdf
    • https://static.s123-cdn-static.com/uploads/4383138/normal_5fc6c7746ff9c.pdf
    • http://wevesapawuzu.22web.org/96462382260.pdf
    • https://zipebamaxotunev.weebly.com/uploads/1/3/2/8/132814247/c990cdf0ba2dd7.pdf
    • http://vigikigopaloze.medianewsonline.com/80179138127.pdf
    • http://viruxego.mygamesonline.org/maduracion_placentaria_ecografia.pdf
    • https://nuwofukejixi.weebly.com/uploads/1/3/1/4/131437867/878740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sedowedi/synthesis_essay_example.pdf
    • https://s3.amazonaws.com/nagev/28_day_banting_diet_plan.pdf
    • http://zifasodokid.epizy.com/sosavalotulisod.pdf
    • https://s3.amazonaws.com/wutogugej/computer_basics_for_beginners_book.pdf
    • https://s3.amazonaws.com/tubupejevomo/xinaroxixolixum.pdf
    • https://s3.amazonaws.com/vavejijitatofu/8867004180.pdf
    • http://xanojeja.rf.gd/cobra_150_gtl_dx_review.pdf
    • http://sofibimibojas.myartsonline.com/32064092029.pdf
    • https://s3.amazonaws.com/lusabifef/juverikodaxupililo.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/aafp_acute_otitis_media_guidelines.pdf
    • https://s3.amazonaws.com/zukogi/solubadavatabedava.pdf
    • http://vizulubafaxal.epizy.com/toro_22in_recycler_lawn_mower_operator_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2d6.bin
56286e94bec291e18223184208217aed0edf200254ed434d8439ddcf2b3867ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D6 5384 bytes
font_01_sfnt_off0000e514.bin
e0fcaeedca95d1f5fbfcafc995cb9547c7f0c57aadd4d80edb9af5c9d9ee1111		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 10344 bytes

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