Malicious PDF — malware analysis report

Static analysis result for SHA-256 012eaf8b291c166a…

MALICIOUS

PDF

40.1 KB Created: 2020-06-03 20:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c686521d7cb7ab5ab042ed9f3f5b202 SHA-1: 651454189ab5536e29bdce7a763267891fe8f218 SHA-256: 012eaf8b291c166afa071dd12e0bec317b0ac7fbea80f73148a237c5a359dee6
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm or SEO poisoning attempt. The primary URL points to a document that appears to be a lure, disguised as information about starter motors, but actually hosts a large number of links to other PDF files. The ML classifier strongly flagged this PDF as malicious.

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://74-123-76-240.mgwnet.com/uploads/1/3/0/3/130379409/130379409.html#starter+motor+parts+and+functions+pdf
    • http://by-joy.com/uploads/1/3/0/7/130776517/xabopo.pdf
    • http://mollyelliott.com/uploads/1/3/0/6/130605077/fanidolulisapo.pdf
    • http://izenbergs.com/uploads/1/3/1/4/131438348/bawekizivufenuk.pdf
    • http://stjohnash.org/uploads/1/3/0/3/130323377/7106582.pdf
    • http://torreyelectricservices.net/uploads/1/3/0/3/130379424/risidupizix.pdf
    • http://liveplanb.com/uploads/1/3/1/8/131856851/4447080.pdf
    • http://hostmaster.lavertonvillagehall.co.uk/uploads/1/3/0/5/130543539/bezitigu-rolurifudusow-vogaletibotida.pdf
    • http://apaplataborsec.com/uploads/1/3/0/3/130313746/lazovewatuwuwawepu.pdf
    • http://tompkinsrealestateco.com/uploads/1/3/1/4/131455734/nobut_gutaxosikode_jiveti.pdf
    • http://punchitperformance.com/uploads/1/3/0/7/130739524/d814d954c75e23.pdf
    • http://beccaweidman.com/uploads/1/3/1/4/131408999/4847198.pdf
    • http://74-123-76-240.mgwnet.com/uploads/1/3/0/3/130379409/terms.html
    • http://74-123-76-240.mgwnet.com/uploads/1/3/0/3/130379409/dmca.html
    • http://74-123-76-240.mgwnet.com/uploads/1/3/0/3/130379409/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sivupakiba.files.wordpress.com/2020/05/pudizero.pdf
    • https://punoxofofaji.files.wordpress.com/2020/06/39669955942.pdf
    • https://fagasufirosi.files.wordpress.com/2020/05/parafitixezazegatoto.pdf
    • https://wibuvevi.files.wordpress.com/2020/05/vulem.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000739c.bin
12f55f8369ab9b191c97ada90fce4cbbc00ce75c967a8fb801335ee681564c92
pdf-font-stream PDF embedded font (sfnt) at offset 0x739C 9644 bytes