Malicious PDF — malware analysis report

Static analysis result for SHA-256 016b849dd08cbbbf…

MALICIOUS

PDF

35.5 KB Created: 2020-05-17 01:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d280a7f65ffb707ae2c82c8823af632b SHA-1: 8f9ab978e4beaa02b4c362569ff4159a968893d8 SHA-256: 016b849dd08cbbbf18400b904c60542e2d561167aeae0ed4da13bff3e0092425
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous PDF links suggests a coordinated effort to distribute content or malware through these external resources. No scripts were extracted, limiting the analysis of direct execution vectors.

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://zebrerenovation.com/uploads/1/3/0/4/130436521/130436521.html#fox+channels+tv+guide
    • http://makinggoodcopsbetter.com/uploads/1/3/0/6/130604641/nafagasag_vobidewomij_sanumopowodot.pdf
    • http://aymd.net/uploads/1/3/0/9/130969592/badapibebezo-rajirivu-guwavubok-ragimiz.pdf
    • http://oritalacreates.com/uploads/1/3/0/7/130776776/sudurokolebofeweweb.pdf
    • http://kwenar.com/uploads/1/3/0/6/130620746/wokopak_vapufojit.pdf
    • http://bovesonline.com/uploads/1/3/1/8/131871780/bemizu.pdf
    • http://alesiaviticulture.com/uploads/1/3/0/6/130604101/suwurodupefik_jovibeji.pdf
    • http://henhousecackle.com/uploads/1/3/0/7/130776783/4498645.pdf
    • http://grubclub247.com/uploads/1/3/0/5/130539035/wuwerap-vulenimasuvutu-poganofoxox-nowizekejana.pdf
    • http://spcrete.com/uploads/1/3/0/5/130547405/nosetususosot.pdf
    • http://gymjohnny.com/uploads/1/3/0/7/130738912/takinoda_nomove_lukesomisuji.pdf
    • http://indivisiblesaintluciecounty.com/uploads/1/3/1/6/131637131/rigejowevupono.pdf
    • http://broccolifarms.com/uploads/1/3/1/6/131606002/guzuxizinobuk_dinutowisov_tejulujurede_vemarixuga.pdf
    • http://itqubate.com/uploads/1/3/0/5/130542728/puven-vedemu.pdf
    • http://desoth.com/uploads/1/3/1/0/131070523/7438665.pdf
    • http://recoletter.com/uploads/1/3/0/5/130551132/52d6984.pdf
    • http://iwa-worldinabox.com/uploads/1/3/0/6/130640139/molimidijezol-jolena-mewej.pdf
    • http://sandyguillot.com/uploads/1/3/0/9/130969200/7a845da46933a.pdf
    • http://luxurynapa.com/uploads/1/3/1/4/131410736/wugerisorolato.pdf
    • http://mymissgrace.com/uploads/1/3/0/5/130588396/e7d9b.pdf
    • http://terrymaddenwrites.com/uploads/1/3/0/6/130621607/gunaze_juwubopiker_topatulevilimi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f4e.bin
d731844132e452bd237d83c3f6bdaa77f76da09d29c5c0fb99f987ce19286045		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4E 10304 bytes

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