Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe577f4d9d9573c3…

MALICIOUS

PDF

34.7 KB Created: 2020-05-21 03:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d69143f74a4e547d77491835899b12b8 SHA-1: 5b6058b11f4dcecfeaca39c7c6d613baecd4e1c7 SHA-256: fe577f4d9d9573c3af146a59039c01e35de02ba547e17d9794e3a386f03c4240
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The ML classifier also strongly indicated maliciousness. The document body, though partially obfuscated, contains a URL that aligns with the observed link farm behavior. This pattern suggests a link farm or SEO poisoning attack designed to drive traffic to malicious or deceptive content.

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://thegapfestival.com/uploads/1/3/0/7/130775134/130775134.html#someone+like+you+piano+sheet+music+e
    • http://magictel.net/uploads/1/3/0/4/130478935/297f0cd0b6592c4.pdf
    • http://thenakediceberg.com/uploads/1/3/1/4/131406650/0dba0eadb6.pdf
    • http://erynnlaflamme.com/uploads/1/3/1/4/131437826/tijagura.pdf
    • http://emilyrmiller.com/uploads/1/3/0/8/130874670/f848a75d1.pdf
    • http://compassportals.com/uploads/1/3/0/6/130620334/9025990.pdf
    • http://pdaconsulting.info/uploads/1/3/1/3/131381806/6734779.pdf
    • http://wiispoland.org/uploads/1/3/0/6/130640092/rawosaf.pdf
    • http://dopestyledownsouth.net/uploads/1/3/0/6/130620835/lijimebodapobi.pdf
    • http://exploregodsworld.net/uploads/1/3/0/8/130874580/kofas.pdf
    • http://moonlightled.ca/uploads/1/3/1/3/131381376/zekas-libukofuboloviv-xutobuvadaraguv.pdf
    • http://chift.org/uploads/1/3/1/4/131437261/4188572.pdf
    • http://macombhomeinspectors.com/uploads/1/3/1/0/131070992/rironagizoj_namapo_biwazodixo.pdf
    • http://maplecrestfarmcbdproducts.com/uploads/1/3/0/5/130588295/ab5db0.pdf
    • http://ecotherapyspiritualcenter.com/uploads/1/3/0/2/130271153/302259c1a9c051a.pdf
    • http://morningtonpeninsuladjs.com/uploads/1/3/0/8/130873868/3061600.pdf
    • http://lindamareescents.com/uploads/1/3/0/6/130603907/6165594.pdf
    • http://ilquadernodeisogni.com/uploads/1/3/0/9/130969798/0752965b3.pdf
    • http://clubs-plus.com/uploads/1/3/1/6/131606756/kepomifaki.pdf
    • http://lartenfete.com/uploads/1/3/0/6/130620997/95e94f098b26d9.pdf
    • http://comphysics.com/uploads/1/3/0/2/130270777/xamogevo.pdf
    • http://jdcarter-vizcom.com/uploads/1/3/1/4/131406802/9014194.pdf
    • http://thisishournormal.com/uploads/1/3/0/4/130491356/403d8725c21.pdf
    • http://hirebc.com/uploads/1/3/0/6/130639950/tuwikiwowipena_sijivagapepos_pixekiniwenaw.pdf
    • http://adamstrucking.info/uploads/1/3/0/2/130272496/pideg.pdf
    • http://drpauleyeschino.net/uploads/1/3/0/7/130738814/lolapeda-fesefi-gufuxi-vajunajumawave.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ac9.bin
56b4d853b7354eeb9e92286d8ec193e7eb23e46ebb512e89d64198165127729a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC9 10492 bytes

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