Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ef9f814678f897…

MALICIOUS

PDF

46.1 KB Created: 2020-05-23 20:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 41fff085da8796e1f8fd76db2bc51e8b SHA-1: ca765981074f071046c92eca1b5271a5b1496a15 SHA-256: 91ef9f814678f8978ab6d8be61097960bbbcc640708c80a18f2c8c3d77b1e842
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, disguised as a fitness guide. The document body text is heavily obfuscated but contains references to the 'Bodyboss ultimate body fitness guide' and the authoring application 'wkhtmltopdf'. The primary attack pattern involves redirecting users to numerous external URLs, likely for SEO spam or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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 http://themagnoliasestate.com/uploads/1/3/0/2/130289508/130289508.html#bodyboss+ultimate+body+fitness+guide PDF link annotation
    • http://dalmaresproduce.com/uploads/1/3/1/4/131438002/8418e.pdfIn PDF document text
    • http://muadmusicfever.com/uploads/1/3/0/9/130969621/muxusojulo.pdfIn PDF document text
    • http://twbmotors.com/uploads/1/3/0/7/130738998/57fd7d9f1a8b6.pdfIn PDF document text
    • http://heartofyogarva.com/uploads/1/3/0/5/130550724/sojojupel.pdfIn PDF document text
    • http://engagementguyconsulting.com/uploads/1/3/0/9/130969738/d03c9d2bad5a.pdfIn PDF document text
    • http://healimmune.com/uploads/1/3/0/2/130272443/6ad79a96440a.pdfIn PDF document text
    • http://msdtesting.com/uploads/1/3/0/6/130620464/tabafekowo.pdfIn PDF document text
    • http://thesavvygirlguide.com/uploads/1/3/1/4/131453387/zufumizeloponelo.pdfIn PDF document text
    • http://kegakoblinds.com/uploads/1/3/0/4/130476469/xixepoboziko_kazonoxam.pdfIn PDF document text
    • http://5divagirls.com/uploads/1/3/0/6/130621831/67d1e4f.pdfIn PDF document text
    • http://rontticat.com/uploads/1/3/1/6/131637219/f93c1bf.pdfIn PDF document text
    • http://achoir.org/uploads/1/3/0/8/130814559/rivigilalizuterozudu.pdfIn PDF document text
    • http://surberlaw.org/uploads/1/3/0/7/130775922/a20ec.pdfIn PDF document text
    • http://varmaccounting.com/uploads/1/3/1/6/131637247/noxiso_kolew_tonad.pdfIn PDF document text
    • http://memorystones.ca/uploads/1/3/0/5/130543087/a3272.pdfIn PDF document text
    • http://wecanbemindful.com/uploads/1/3/0/4/130489054/kufujosuzanani_depijipab_dekulew.pdfIn PDF document text
    • http://thegivenessproject.org/uploads/1/3/0/5/130550785/2da86820.pdfIn PDF document text
    • http://my-lazio.com/uploads/1/3/1/4/131482850/sinomiredu_dotuxino_nidugob_zelum.pdfIn PDF document text
    • http://nontique.com/uploads/1/3/0/9/130969446/b839e4a4efee28d.pdfIn PDF document text
    • http://kalilabdullah.com/uploads/1/3/0/4/130483244/fugonenimov.pdfIn PDF document text
    • http://successfulbusinessstrategies.com/uploads/1/3/0/5/130546937/kalowut.pdfIn PDF document text
    • http://sprinklesweets.com/uploads/1/3/0/6/130621393/6086592.pdfIn PDF document text
    • http://reneedumarr.com/uploads/1/3/0/7/130739871/kekotudoko_bonubaneto_vunamapa_repej.pdfIn PDF document text
    • http://maxluxeminklashes.com/uploads/1/3/0/3/130313504/degobugadulojil_jemeboluf_depur_zuxajebos.pdfIn PDF document text
    • http://bestak47.com/uploads/1/3/0/5/130544072/kibaboviz_pilipubol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7658 5012 bytes
SHA-256: d8516b967b6be069a2f17b596fd094a86b8dac13c0ce90cebf75e389cbe0895a
font_01_sfnt_off00008402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8402 11604 bytes
SHA-256: fd1e26babd78f0341d38e527968144023f5191f1f0ddbc43cca3297af77b88df

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