Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6ce57bc889a747…

MALICIOUS

PDF

41.7 KB Created: 2020-03-27 08:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b913565ce9377ef567a40a254ec8dff3 SHA-1: ad9178d1ad50e28c0d02e8eccc52fbe78e1b9e5b SHA-256: 6d6ce57bc889a74786bd59915c4454d62883cf82542c5ff5d4bd7eb746cf0096
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files across various domains, a technique often used for SEO link farming or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the heuristic indicates a significant number of external links were generated. No scripts were extracted, but the document body and embedded URLs suggest a deceptive content distribution or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://skaosg.net/uploads/1/3/0/7/130775734/130775734.html#libro+de+precios+unitarios+peimbert PDF link annotation
    • http://andrewmodels.com/uploads/1/3/0/7/130739498/935ca.pdfIn PDF document text
    • http://evideoplaces.com/uploads/1/3/0/9/130970004/dorisadakem.pdfIn PDF document text
    • http://bigbrightearth.com/uploads/1/3/0/2/130270785/wasiw_xupawiposikuno.pdfIn PDF document text
    • http://11052008.com/uploads/1/3/0/5/130588185/6866603.pdfIn PDF document text
    • http://runwayofficecenter.com/uploads/1/3/0/6/130604036/liderebuges-najuvujen.pdfIn PDF document text
    • http://bitelectrical.net/uploads/1/3/0/8/130874257/7984678.pdfIn PDF document text
    • http://idutur.com/uploads/1/3/0/5/130539840/begoxonu.pdfIn PDF document text
    • http://eileenmenzel.com/uploads/1/3/0/4/130483459/1b6e69c8b.pdfIn PDF document text
    • http://www.uotservices.com/uploads/1/3/0/8/130814553/a959939.pdfIn PDF document text
    • http://modavalienteluxury.net/uploads/1/3/0/6/130621225/f18a751c.pdfIn PDF document text
    • http://knipimperium.nl/uploads/1/3/0/9/130968981/dejepupuda_labavezadupog_lavapagutu.pdfIn PDF document text
    • http://mvpopen.com/uploads/1/3/0/8/130814432/8248309.pdfIn PDF document text
    • http://stiffywet.net/uploads/1/3/0/4/130476089/44bf467ef8f338.pdfIn PDF document text
    • http://myfullsteam.com/uploads/1/3/0/5/130547527/jikol-laviris.pdfIn PDF document text
    • http://nikkishandmadeboutique.com/uploads/1/3/0/2/130291939/zowaparotalar_bewidinezined_wenos.pdfIn PDF document text
    • http://pof-addcallservices.com/uploads/1/3/0/5/130541688/mapusakerir.pdfIn PDF document text
    • http://disabilityindiana.org/uploads/1/3/0/6/130604675/ee285736996.pdfIn PDF document text
    • http://bandobelts.ca/uploads/1/3/0/4/130435631/dikife-dabeketipe-mimolimuzoxu.pdfIn PDF document text
    • http://emmadaffern.com/uploads/1/3/0/3/130313024/e9330b01b7e4.pdfIn PDF document text
    • http://www.saltspringbulbs.com/uploads/1/3/0/5/130588942/8c7e8.pdfIn PDF document text
    • http://arquitetandoartes.com/uploads/1/3/0/7/130776273/mivome.pdfIn PDF document text
    • http://bellmansionbedandbreakfast.com/uploads/1/3/0/3/130313027/489635.pdfIn PDF document text
    • http://www.peakperformancenlp.com/uploads/1/3/0/4/130435518/wonabepamopeso_fetudikenuje_goxupav.pdfIn PDF document text
    • http://marketingschiff.ch/uploads/1/3/0/6/130620689/3195528.pdfIn PDF document text
    • http://ccpropertyinvestment.com/uploads/1/3/0/5/130550777/17fdd09c4e7a.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
🗂 Part of campaign: butterflykissescrafts.com 5 samples

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Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7778 9136 bytes
SHA-256: cf6ce3a401f5bac0da3725476445b651693364905f32831d9b066c32f5eb2a25

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