Malicious PDF — malware analysis report

Static analysis result for SHA-256 b44de25beac11d8f…

MALICIOUS

PDF

87.3 KB Created: 2021-07-01 11:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09fc859568e1926dfdc0bd6d70d989a3 SHA-1: f28e78beae3aaef94f13298e26a175ab2f969adf SHA-256: b44de25beac11d8f4a8f4e212096e12df48ec79dc856a887993bb35c2f99efd9
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of an advance-fee scam lure. It contains numerous links to external websites, many of which point to compromised CMS upload storage, suggesting a distribution mechanism for further malicious content. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://crewmak.ru/uplcv?utm_term=john+wick+chapter+2+online+streaming
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ac3be4a3d---74008639553.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9ab32662fa34ab4a16e8d3cf49a7318a/37676962518.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4f839adf1---lubisomanabidabenemo.pdf
    • http://year-c.com/upload_fck/file/2021-6-6/20210606064615957586.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/86803b734361432cda6b50644e5ceca1/sofilobinow.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd237be1d8---toxedanizog.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4db09d3112---80148172737.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c82c7a88a0---vixeris.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d2707f3aa776c59918dfd529eea79b1d/1617679291.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d377da69564---32378304153.pdf
    • https://hogies.com/includes/template/uploads/file/mozokeju.pdf
    • https://dienlanhbachkhoa.info/upload/files/porore.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160827006cf0f0---zigawakitotenabuj.pdf
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/wefotivotox.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/b5b3e01dda7f91f7368fe9c93073bc25/13441465550.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efe684abb3---zivowibusozas.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/7bfebfba0fdbea69f4cf4267dcaa65fd/luvutorakut.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/dumibebateridexetuvifet.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/97694288197.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e25ab2b0a---wiviren.pdf
    • http://dalaichau.com/files/76143482572.pdf
    • http://candientushinko.com/images/file/fusatefulupekiwakezomiliw.pdf
    • https://vanvoorst.info/uploaded/file/zovexaxisojavipon.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/03f711be0716d0b43d9bdf828c1a02bd/32683490608.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9d07c4e45---tonebomovikopum.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03c.bin
baba8f489829d282d196b90075630deb90ba2dbbbf5112d1ac76cba729bc10b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF03C 17452 bytes
font_01_sfnt_off00011db1.bin
457e141d65e5b2fcf59fedcf3e59f7ed1454a70db5256a4a249604d13b9d3d31
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB1 11112 bytes
font_02_sfnt_off000137a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137A0 16792 bytes