Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eebbd5b89cc1390…

MALICIOUS

PDF

59.5 KB Created: 2020-03-30 10:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 42f32b9719deb2fe4110c2229e812e7a SHA-1: a7c539711fd448187530b0bcf078353da06d58cc SHA-256: 7eebbd5b89cc13909e9e19af2c8ef4d7dd1c2fe11864f936fbe2a01fff8d0dbc
136 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous external URLs that likely lead to malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external PDF links, suggesting an attempt to distribute malware or phish for credentials. The presence of a PDF link to 'http://childrenshospitalholidaycardproject.org/uploads/1/3/0/7/130739875/2ab34a7bda.pdf' further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://74-123-76-23.mgwnet.com/uploads/1/3/0/6/130620564/130620564.html#calendario+pre+registro+comipems+2020 PDF link annotation
    • http://melaniedietrich.com/uploads/1/3/0/8/130874085/7325800.pdfIn PDF document text
    • http://greerblackmon.com/uploads/1/3/0/2/130289658/debopinokopo.pdfIn PDF document text
    • http://stillwelltrailersales.com/uploads/1/3/0/6/130605447/welaxijizizakaviguxa.pdfIn PDF document text
    • http://jeandoyendemontaillou.com/uploads/1/3/0/6/130604787/zexiv.pdfIn PDF document text
    • http://embroidesign.com/uploads/1/3/0/2/130272318/5a69e6d441.pdfIn PDF document text
    • http://harvesthealthandfitness.com/uploads/1/3/0/5/130590778/bosalatirog.pdfIn PDF document text
    • http://majasmote.net/uploads/1/3/0/2/130270743/05e609fb89.pdfIn PDF document text
    • http://hamelinkfarms.com/uploads/1/3/0/5/130551749/latas_xisejak_busumiru.pdfIn PDF document text
    • http://hempdreamweaver.com/uploads/1/3/0/5/130543536/tepeduvuku.pdfIn PDF document text
    • http://waggawaggaprobus.waggamatters.com/uploads/1/3/0/3/130379423/232b253a2bd0e9c.pdfIn PDF document text
    • http://excercis-ng.com/uploads/1/3/1/3/131381237/3779027ef.pdfIn PDF document text
    • http://rpwbeauty.com/uploads/1/3/0/6/130639468/vumixazagagajufo.pdfIn PDF document text
    • http://horbtn.org/uploads/1/3/0/5/130588337/vosolufudi.pdfIn PDF document text
    • http://montserratandco.com/uploads/1/3/0/6/130604108/gowogegodur.pdfIn PDF document text
    • http://galileobrazil.com/uploads/1/3/0/7/130738693/feweli_nisofo.pdfIn PDF document text
    • http://childrenshospitalholidaycardproject.org/uploads/1/3/0/7/130739875/2ab34a7bda.pdfIn PDF document text
    • http://binnach.com/uploads/1/3/0/5/130589444/damisafipifu-wofalapa-duvedobuwazux-vekopuzeb.pdfIn PDF document text
    • http://livingworkfreedom.com/uploads/1/3/0/5/130550754/fodovadovopife.pdfIn PDF document text
    • http://pisteciclabili.net/uploads/1/3/0/4/130483519/1367999.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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFD 9736 bytes
SHA-256: 1d3f9925f8152b8c6f85f30b1f38ccb11ff292b19f602916d34cef88e49c959d

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