Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1ab3d7d94045d3…

MALICIOUS

PDF

32.2 KB Created: 2020-05-18 18:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: b530ba6bb340efd44c253662e514869c SHA-1: 0900f39e9a7c6c2a73a3fa3426153f5192ff1a5d SHA-256: 4d1ab3d7d94045d3e07974e4028e599d086a88dff864785e7eaf9e03e6798a3c
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML classifier also strongly indicated maliciousness. This suggests the document is part of a link farm or SEO poisoning scheme, potentially designed to distribute malware or engage in phishing by luring users to malicious sites.

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://blackhawbuilders.com/uploads/1/3/0/7/130739294/130739294.html#panasonic+blu+ray+player+dmp-bd77+manual PDF link annotation
    • http://scottsavell.com/uploads/1/3/0/6/130620909/dixebuguse.pdfIn PDF document text
    • http://iftardeals.com/uploads/1/3/0/2/130271229/gigafubowivaju-lejatilabon-xemimiv-togugarekotulef.pdfIn PDF document text
    • http://onlygodcanjudgeus.com/uploads/1/3/1/3/131398017/gokavizubufelulugo.pdfIn PDF document text
    • http://esdaw.org/uploads/1/3/0/8/130874347/suguw_nisalilemunet.pdfIn PDF document text
    • http://pasadena-rc.com/uploads/1/3/0/3/130313183/6131869.pdfIn PDF document text
    • http://justjimmusic.com/uploads/1/3/0/5/130590521/zaraguwit.pdfIn PDF document text
    • http://altobassist.com/uploads/1/3/0/4/130478433/7533979.pdfIn PDF document text
    • http://toocrafty.com/uploads/1/3/0/6/130639518/bodosixeka.pdfIn PDF document text
    • http://deirdrebergeron.com/uploads/1/3/0/8/130813649/5116015.pdfIn PDF document text
    • http://multiviewglassesonline.com/uploads/1/3/0/5/130588545/keviwavawu.pdfIn PDF document text
    • http://vanessabarreto.com/uploads/1/3/1/3/131379039/ec8a99c9.pdfIn PDF document text
    • http://joy-farm.com/uploads/1/3/1/4/131453944/gaxojeli.pdfIn PDF document text
    • http://facultyretreat.org/uploads/1/3/1/8/131857243/9975841.pdfIn PDF document text
    • http://hrningidraetscenter.com/uploads/1/3/1/8/131871951/kenubilisazoxo_pujodelagufe_buxuzikiwabul_korizomefo.pdfIn PDF document text
    • http://theseancetattooparlor.com/uploads/1/3/0/6/130621815/raliza.pdfIn PDF document text
    • http://triplenetmarketplace.com/uploads/1/3/1/4/131437330/fagamategixa.pdfIn PDF document text
    • http://livingthepondlife.org/uploads/1/3/0/4/130488884/a3bd181.pdfIn PDF document text
    • http://brandoneldredge.com/uploads/1/3/0/4/130488228/4c371d3d01.pdfIn PDF document text
    • http://karmacleaning206.com/uploads/1/3/0/5/130539922/zedolom-nimetenopunatu-nilepumakazime-finidesinig.pdfIn PDF document text
    • http://partywithbows.com/uploads/1/3/0/3/130313013/3910742.pdfIn PDF document text
    • http://opencampus.org/uploads/1/3/0/8/130873869/biliki_fefemegev.pdfIn PDF document text
    • http://juliusgibbs.com/uploads/1/3/1/3/131384306/745287.pdfIn PDF document text
    • http://eos-cbd.com/uploads/1/3/1/8/131857247/lusanimikememobu.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 1

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_off0000569a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x569A 8780 bytes
SHA-256: 7dad4eaf25ec991f876d617f8334ddbc3ceaea25f626a4c99e1c5f2cb179a7d8

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