Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab92e1220618e98c…

MALICIOUS

PDF

110.7 KB Created: 2021-07-03 07:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8383e49ee0a00d4ecd92a8181dfd66c1 SHA-1: 38fc81ae84bd1e324674c9328a71d22bbbd9e376 SHA-256: ab92e1220618e98c2e7768a77cd5f8e195fc441cab60a7b0d89d3c72418e91cf
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support the classification as a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/mmooelfhdmj8ptamq410qk7ls9/57059545426.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3dfd20b20---80526786784.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e9306fbadc98f7d73194f6dc60c794e1/1811066800.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084869c8121c---bigowovitenupibodanipa.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085576731496---wesixazawazasalogu.pdf
    • http://apcmagon.com/userfiles/jinelidexamoremo.pdf
    • http://mywayrtk.info/userfiles/file/japozabisenike.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/a8420138f17300ce85c6a155ac9c5f7e/85120778044.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c60bdb911b1---norixelesoxufokipuwikibu.pdf
    • http://fecirturizm.com/resimler/files/79157906689.pdf
    • https://szaniterplaza.hu/ckfinder/userfiles/files/gavogikibep.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/372b6792b2d6c65550a7d21b3bad8404/27666327145.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905ce5b90a4---65410149459.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/55e995113g7jptcd3im7lg8tm3/rigenuzen.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/8e30ce7551b54a119c5b006fd8538740/4530100760.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/d90cd8f8bc30dac16763124604b25893/92799506119.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff13e93ae7---82493223622.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03f449b01b---44215202035.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b335a0976f---jedejikujetuzipazofud.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/b0d69a2cf5ef36f8318e9edd7f7b6f25/putugonabaneger.pdf
    • https://dewalt-naradi.cz/media/upload/editor/file/dudaj.pdf
    • http://cainghienbinhduong.com/uploads/userfiles/file/49884786439.pdf
    • https://viettincapital.vn/upload/files/gibixobo.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/98d7d0d4f9f18190305266cca6829193/vojegekowe.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/gps6pvj59fnnqfkm3j8psp0rjd/97380818364.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607443c68dcc3---46480006813.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=i+think+my+water+broke+but+no+contractions
    • 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_off00014c1b.bin
0e3940d023c11bca0d80bed138ed727401ae544fe6a55d14c10e4d1b12a383aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1B 18180 bytes
font_01_sfnt_off00017be7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17BE7 16792 bytes
font_02_sfnt_off000193fe.bin
37e156187bdc1c9e9fefbd0653187b4f8436ec3819abf3ea11223a569cba7e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193FE 10932 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.