Malicious PDF — malware analysis report

Static analysis result for SHA-256 a389ea77e2ca7057…

MALICIOUS

PDF

36.6 KB Created: 2020-05-24 23:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: a8c3927535781f69be3c84ce3df5e0e9 SHA-1: 0b461b63d631a52c1e289aeccab038aceb260aca SHA-256: a389ea77e2ca7057bc2c797705b84d44292859f41615191c77c1649097294de9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, a technique often used for SEO manipulation or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The presence of numerous links to domains like 'alpxpress.com' and '3ok.undesirable.us' suggests a coordinated effort to distribute or host harmful content, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://3ok.undesirable.us/uploads/1/3/0/7/130740368/130740368.html#up+in+michigan+ernest+hemingway PDF link annotation
    • http://alpxpress.com/uploads/1/3/0/2/130289589/2938406.pdfIn PDF document text
    • http://genesishomeimprovements.com/uploads/1/3/0/2/130287269/3405e1539b3.pdfIn PDF document text
    • http://gottatravelwedding.net/uploads/1/3/0/5/130589104/kirelatu.pdfIn PDF document text
    • http://pyramid3mgt.com/uploads/1/3/0/6/130639456/6a7fb.pdfIn PDF document text
    • http://jassoshousecleaning.com/uploads/1/3/0/7/130740013/robonefiki.pdfIn PDF document text
    • http://barringtonmiddleschoolpto.com/uploads/1/3/1/3/131379700/3486833.pdfIn PDF document text
    • http://ecordeiro.net/uploads/1/3/0/6/130604687/3687761.pdfIn PDF document text
    • http://cordlesswindowshade.com/uploads/1/3/1/6/131607984/figuma.pdfIn PDF document text
    • http://goodsteprogram.com/uploads/1/3/0/5/130550901/fuzuge.pdfIn PDF document text
    • http://seahorseconnections.com/uploads/1/3/1/4/131406448/3934705.pdfIn PDF document text
    • http://retailasphaltequip.com/uploads/1/3/0/5/130551754/konatipalugowuz.pdfIn PDF document text
    • http://nowelwellness.com/uploads/1/3/0/5/130589174/5b190274d1.pdfIn PDF document text
    • http://kbwebdesigns.com/uploads/1/3/0/7/130740389/9597911.pdfIn PDF document text
    • http://lovesthishouse.com/uploads/1/3/1/6/131636648/10ce258.pdfIn PDF document text
    • http://thaisamesame.com/uploads/1/3/1/0/131070799/wajowuju.pdfIn PDF document text
    • http://sylviapuchalska.com/uploads/1/3/0/2/130288887/jikajezuxupufaluzezo.pdfIn PDF document text
    • http://dreamsofsoundstudios.com/uploads/1/3/0/8/130874179/90b57.pdfIn PDF document text
    • http://kaciearmstrong.com/uploads/1/3/1/4/131406621/c02c4e6.pdfIn PDF document text
    • http://mobiledoggroominglasvegas.com/uploads/1/3/0/6/130639954/faxubuveg.pdfIn PDF document text
    • http://stronglikelion.com/uploads/1/3/1/3/131380138/zopebanumomo-jixizipe-warowefas-pararupulusaraw.pdfIn PDF document text
    • http://jr-group.org/uploads/1/3/0/3/130379391/1051970.pdfIn PDF document text
    • http://thecatchoutdoors.com/uploads/1/3/1/3/131384115/e7fa26.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 3

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_off000064ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BA 9920 bytes
SHA-256: bd688e70adb9c8be617bf8dbb0cda4b582edaceaeb1ee1f04ef74b7c4d2c5dc4

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